Device to protect water pipe from water hammering and frozen water expansion

Abstract

A device designed to relieve expanded volume, flow and pressure within a water pipe system by utilizing a pair of spring loaded pistons within a valve body, such that the increases volume caused by various sources can be accommodated within the valve body by the spring loaded pistons. The device allows normal flowing under regular operating parameters and will perform its function automatically as the flow and pressure increases beyond the spring setting. The device will reset to its starting configuration after the operating parameters return to normal without external monitoring or input.

What is claimed is: 
     
         1 . A device designed to prevent pipe damage caused by expanding frozen water, comprising:
 an valve body with a first and a second cannister, each with a closure end and an open end, that form a cylindrical cavity when joined laterally by each open end; each first and second cannister further having a tubular core extending longitudinally from the closure until before the open end, such that when each first and second cannister join laterally by each open end forms a longitudinal pathway throughout the valve body between each tubular core; each first and second cannister has means on its enclosure end to be attached to a receiving pipe section;   a connecting ring between each first and second cannister;   a first and second spring, each placed around the tubular core and at the enclosure end of each first and second cannister; and   a first and second piston, each placed around the tubular core abutting the spring in each first and second cannister; each piston is radially flush between the tubular core and the cylindrical cavity of the valve body, such that space occupied by each first and second spring is sealed from the longitudinal passage through the valve body; each first and second piston are pressed into contact with each other by the first and second spring;   each tubular core of first and second cannister has at least one orifice to lead to space between each piston.   
     
     
         2 . A device according to  claim 1 , wherein each piston has at least one annular indentation with a rubber ring placed therein. 
     
     
         3 . A device according to  claim 1 , wherein each piston further having angular indentation towards open end of each cannister. 
     
     
         4 . A device according to  claim 1 , wherein each cannister has at least one vent escape hole through to the cavity space occupied by each first and second spring. 
     
     
         5 . A device according to  claim 1 , wherein each tubular core has at least one orifice that lead to space between the pistons, granting access to the longitudinal pathway through the valve body. 
     
     
         6 . A device according to  claim 1 , wherein each tubular core is of such length that they do not come in contact when the cannisters are connected. 
     
     
         7 . A device according to  claim 1 , wherein each first and second cannister has means on its enclosure end to be attached to a receiving pipe section that are threading means; 
     
     
         8 . A device according to  claim 1 , where in each first and second cannister attach its enclosure end to a pipe section with a locking nut; 
     
     
         9 . A device designed to adapt increased flow and pressure within water pipes, comprising:
 an valve body with a first and a second cannister, each with a closure end and an open end, that form a cylindrical cavity when joined laterally by each open end; each first and second cannister further having a tubular core extending longitudinally from the closure until before the open end, such that when each first and second cannister join laterally by each open end forms a longitudinal pathway throughout the valve body;   a connecting ring between each first and second cannister;   a first and second spring, each placed around the tubular core and at the enclosure end of each first and second cannister;   a first and second piston, each placed around the tubular core abutting the spring in each first and second cannister; each piston is radially flush between the tubular core and the cylindrical cavity of the valve body, such that space occupied by each first and second spring is sealed from the longitudinal passage through the valve body; each first and second piston are pressed into contact with each other by the first and second spring;   
     
     
         10 . A device according to  claim 9 , wherein each piston has at least one annular indentation with a rubber ring placed therein. 
     
     
         11 . A device according to  claim 9 , wherein each piston further having angular indentation towards open end of each cannister. 
     
     
         12 . A device according to  claim 9 , wherein each cannister has at least one vent escape hole through to the cavity space occupied by each first and second spring. 
     
     
         13 . A device according to  claim 9 , wherein each tubular core has at least one orifice that lead to space between the pistons, granting access to the longitudinal pathway through the valve body. 
     
     
         14 . A device according to  claim 9 , wherein each tubular core is of such length that they do not come in contact when the cannisters are connected. 
     
     
         15 . A device according to  claim 9 , wherein each first and second cannister has means on its enclosure end to be attached to a receiving pipe section that are threading means; 
     
     
         16 . A device according to  claim 9 , where in each first and second cannister attach its enclosure end to a pipe section with a locking nut;